American Cancer Society American Heart Association Ann Intern Med Arch Intern Med Biol Chem Boca Raton Brain Res Cancer Res Cell Biol Churchill Livingstone Clin Invest Department of Agriculture Government Printing Office Institute of Medicine Marcel Dekker National Academy of Sciences National Cancer Institute National Research Council New England Journal of Medicine Nucleic Acids Res Proc Natl Acad Sci Public Health Service San Diego University of California World Health Organization
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